| abstract |
PROBLEM TO BE SOLVED: To provide a polymer / liquid crystal composite having high transparency and isotropic properties and having a large and stable Kerr coefficient in a wide temperature range despite the high content of liquid crystal material, and the composite An optical element whose refractive index changes by applying a voltage is provided. SOLUTION: A total of 1 to 40% by weight of an optically active compound, a nematic phase, an absolute value of a product of refractive index anisotropy and dielectric anisotropy is 0.5 to 60, and a viscosity is 1000 mPa · a composite of an optically active liquid crystal material and a polymer, which is a mixture with a total of 60 to 99% by weight of a liquid crystal material that is not optically active, and has a Kerr coefficient of 1 × 10 −9 mV −2 or more A polymer / liquid crystal composite that is optically isotropic when no voltage is applied. [Selection figure] None |